System 1: Xubuntu 15.10 64-bit, GeForce 960, AMD 860K cpu
System 2: Ubuntu 14.04 64-bit, GeForce 750Ti, AMD FX-6200 6 core
Broken: 2.77a 64-bit Linux. Official build from Blender.org
Cloth simulation has errors when using the solidify modifier with the "Even Thickness" option checked.
Exact steps for others to reproduce the error
Use the attached blend file.
If the cloth is not baked, bake it. Afterwards, play the animation. There should be errors, which look like pieces of the cloth are being pushed around quickly. Now turn off "Even Thickness" in the solidify modifier on the shorts and they go away.